Our take
The Optoma UHD38x is a home projector for buyers who value its listed UHD output and high-refresh 1080p gaming mode. Optoma specifies up to 240 Hz at 1080p with 4.2 ms input lag, plus a 1.5–1.66:1 standard throw. The 4,000-lumen figure is not labeled ANSI, and the reviewed page does not state the native pixel count of its imaging device.
A fixed home gaming or entertainment room with conventional throw distance and a source that can use the documented refresh modes..
It is not a wall-adjacent UST projector, a lamp-free system, or a safe choice for an ANSI brightness threshold based on the 4,000-lumen figure.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Optoma lists UHD 3840 × 2160 output and a separate 1080p 240 Hz gaming mode with a stated 4.2 ms response.
- Two HDMI 2.0 inputs, 3.5 mm audio, S/PDIF, RS-232, and a 12 V trigger support a fixed-room source setup.
- Manual 1.1× zoom and a published 1.5–1.66:1 ratio allow a buyer to calculate placement before mounting.
What to weigh up
- The 4,000-lumen rating is not labeled ANSI and should not be used to pass an ANSI-specific requirement.
- The page calls the image True 4K UHD but does not establish the projector's native imaging-device pixel count.
- Its 240 W lamp and zero vertical lens shift mean owners must plan for lamp maintenance and accurate placement.
The key details
| Model covered | UHD38x |
|---|---|
| Image format | UHD 3840 × 2160 listed output; native imager pixel count not established |
| Rated light output | 4,000 manufacturer-listed lumens; not labeled ANSI; 240 W lamp |
| Placement | 1.5–1.66:1 conventional throw, manual 1.1× zoom, vertical lens shift +0% |
Performance figures are manufacturer claims. Source checked October 11, 2026. Regional models and included accessories can differ.
What the features mean for you
What does its UHD label establish?
Optoma lists UHD 3840 × 2160 resolution and says its DLP projectors can project 8.3 million on-screen pixels. The page does not identify the native pixel count of the imaging device, so the profile keeps that attribute unknown rather than treating output wording as proof of a native 3840-pixel chip. For viewing, the UHD output is the relevant manufacturer claim; for a strict native-resolution comparison, ask for a model-specific technical explanation. Supported input format, displayed output, and native imager are separate facts.
Which gaming mode matches your console or PC?
Optoma describes a 1080p mode up to 240 Hz with a 4.2 ms input-lag figure. The statement applies to that timing and should not be carried over to every resolution or source configuration. This makes the model interesting for fast 1080p gaming, while its UHD output serves films and more detailed compatible content. Check what refresh rates your graphics card or console can send and which cable and HDMI port support the desired timing. The claim is a manufacturer specification, not measured performance from the actual offer.
How much room does the lens require?
The 1.5–1.66:1 throw ratio is a conventional installation, and the 1.1× optical zoom offers only bounded adjustment. The specification lists vertical lens shift as zero percent, so do not plan on shifting the image optically to correct an imprecise mount. Measure lens-to-screen distance, image size, and mounting height before purchasing a ceiling bracket. The model is not a UST projector for furniture directly beside a wall. Digital corner correction may change the image shape but is not a substitute for the correct optical position.
Can the brightness number be compared with ANSI models?
Optoma gives 4,000 lumens but does not identify that value as ANSI on the reviewed page. Keep it separate from projector specifications explicitly measured in ANSI lumens. Ambient light, screen size, image mode, and the condition of a lamp affect what a viewer sees; the model rating cannot confirm a used projector's output. The home-entertainment page describes use without direct sunlight or lights pointed at the screen. Ask for a current demonstration at your planned picture size instead of inferring the result from the marketing number.
What does a fixed setup need beyond the projector?
Dual HDMI 2.0 inputs can serve a game console and another UHD source, while audio output, S/PDIF, RS-232, and a 12 V trigger help integrate separate equipment. The projector's 10 W speaker may simplify a basic setup, but a room system can still benefit from external audio. A 240 W lamp is specified; remaining hours, dust condition, remote, cables, and seller-included accessories are specific to the unit. Use the exact-model Amazon search as a listing check, not as proof that any historical ASIN or package is the right one.
What else to compare
Compare the HD146X for lower-cost Full HD gaming, or an UST model when the room cannot provide a standard lens distance.
Before you buy
Does UHD 3840 × 2160 prove a native 4K imaging chip?
No. Optoma specifies UHD output and on-screen pixels, but the reviewed page does not state the native imager pixel count.
At what timing does Optoma state 4.2 ms?
The manufacturer associates 4.2 ms with its 1080p gaming mode, which it lists up to 240 Hz.
Are the 4,000 lumens ANSI?
The reviewed Optoma page lists 4,000 lumens without labeling the figure as ANSI.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Optoma UHD38x official product page ↗ — checked October 11, 2026.
- Optoma UHD38x official product page and specifications ↗ — checked October 11, 2026.
The decision
Choose the UHD38x when its stated 1080p refresh mode and measured conventional throw fit the room, and confirm the exact lamp unit.
Is it the right fit?
Check the exact model and today’s offers on Amazon.